Behaviour of stainless steel bolts after exposure to elevated temperatures

被引：24
|
作者：
Hu, Ying [1 ,2 ]
Tang, Sheng-Lin [1 ,2 ]
George, Adomako Kumi [1 ,2 ]
Tao, Zhong [3 ]
Wang, Xing-Qiang [3 ,4 ]
Huu-Tai Thai [5 ]
机构：
[1] Chongqing Univ, Key Lab New Technol Construct Cities Mt Areas, Minist Educ, Chongqing 400045, Peoples R China
[2] Chongqing Univ, Sch Civil Engn, Chongqing 400045, Peoples R China
[3] Western Sydney Univ, Ctr Infrastruct Engn, Penrith, NSW 2751, Australia
[4] Shandong Polytech, Dept Civil Engn, Jinan 250104, Shandong, Peoples R China
[5] Univ Melbourne, Dept Infrastruct Engn, Parkville, Vic 3010, Australia
来源：
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH | 2019年 / 157卷
基金：
中国国家自然科学基金;
关键词：
Stainless steel bolts; Post-fire; Residual properties; Material model; Stress-strain curves; STRESS-STRAIN CURVES; GRADE; 8.8; BOLTS; MECHANICAL-PROPERTIES; TESTS; MODEL;
D O I：
10.1016/j.jcsr.2019.02.021
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
This paper presents experimental results of residual material properties of stainless steel bolts (austenitic grades A2-70 and A4-70) after exposure to elevated temperatures. Effects of temperature (20-900 degrees C) and cooling method (cooling in air and cooling in water) on the mechanical properties (i.e., Young's modulus, yield stress, ultimate strength, ultimate strain and strain hardening exponent) of the two types of bolts are investigated. The residual properties of the stainless steel bolts are also compared with those of structural austenitic stainless steel and conventional high-strength structural bolts made of carbon steel. It was found that the exposure to elevated temperature only had a marginal influence on the residual behaviour of stainless steel bolts, which is consistent with the observation for structural austenitic stainless steel. In general, stainless steel bolts have superior post-fire performance compared with conventional carbon steel bolts. Based on the test data, an existing model proposed earlier for structural austenitic stainless steel was modified to predict stress-strain curves of stainless steel bolts after exposure to elevated temperatures. (C) 2019 Elsevier Ltd. All rights reserved.
引用
收藏
页码：371 / 385
页数：15
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